Doohan studied at the University of Arkansas and in 1982 won the NCAA doubles championships alongside Pat Serret . He was chosen twice for the All-American selection. In 1984 he won his first and only individual title on the ATP World Tour in Adelaide . In the same year he also won his first double title at the ATP tournament in Tel Aviv . In the following year he was twice in an individual finals, his last participation in the finals he had in 1987. All three tournaments were played in Australia. In total, he won five ATP doubles titles in the course of his career, and he made it into a double-final nine times. Towards the end of the 1980s he played increasingly on the ATP Challenger Tour and was able to win the Challenger tournament in San Luis Potosí in 1988. He reached his highest ranking in the world rankings in 1987 with position 43 in singles and in 1987 with position 15 in doubles.
His best individual result in a Grand Slam tournament was reaching the round of 16 at the Australian Open and Wimbledon in 1987, where, as a largely unknown player in Germany, he surprisingly won in the second round against defending champion and two-time champion Boris Becker . In the doubles competition, he reached the final of the Australian Open in 1987 on the side of Laurie Warder , which was lost to Stefan Edberg and Anders Järryd . In addition, he was twice in the semifinals of Wimbledon.
Australia
Huub van Boeckel
Tel Aviv
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Brian Levine
Colin Dowdeswell Jakob Hlasek
Livingston
